Hot-air furnace.



J. E. ERGANBRAOK.

HOT AIR FURNACE. nrmouron FILED MAY 17, 1912.

Patented Mar. 9, 1915.

8 SHEETS-SHEET 1.

THE NORRIS PETERS 60.. PHuTO-LITHD... WASHINGION.

J. E. ERGANBRAGK. HOT AIR FURNACE. APPLIG'ATION FILED MAY 17, 1912.

1 1 30,7 1 8. Patented Mar. 9, 19 15.

3 SHEETS-SHEET 2- THE NORRI$ PETERS CU PHOTD LlTHQ, WASHINGIDN. D. C

J. E. ERGANBRAGK.

HOT AIR FURNACE.

APPLICATION FILED MAY 17, 1912.

Patented Mar. 9, 1915.

3 SHEETS-SHEET 3.

rmlvahlTs v. M {gm/674% THE NORRIS PETERS C11. PHOTO-LITHQ. WASHINGION, D. C,

forms a part of JOHN EDWARD ERGANBRACK, 0F WOODSTOCK, ILLINOIS.

HOT-AIR FURNACE.

Application filed May 17, 1912.

To all whom it may concern:

Be it known that I, J OI-IN EDWARD ERGAN- BRAGK, citizen of the United States, residing at Woodstock, in the county of McHenry and State of Illinois, have invented certain new and useful Improvements in Hot-Air Furnaces, of which the following is a specification.

This invention relates to hot air furnaces and the especial object of the invention which forms the subject matter of this application for patent is to provide a furnace of simple form and economical construction which will conserve the heat produced and which may be easily and thoroughly cleaned and repaired.

Having the aforegoing, and other objects of general utility in view, I have invented a furnace which is made up in sections that may be disconnected where it is necessary to move it through doorways too narrow to accommodate the entire structure, and when it becomes desirable to clean out the flues.

I have also designed an air heating appliance in which the furnace proper may be easily disassociated from its casing and conductor pipes by sliding it outwardly; in which the flues are easily and fully controllable and cleanable from the front of the furnace casing; in which provision is made for thoroughly moistening the heated air, and in which the products of combustion are caused to travel over a considerable flue area before escaping to the chimney.

In the accompanying drawing which this application, I have shown my improved furnace in an approved form, in the following briefly described views Figure 1 is a front elevation of a complete furnace embodying my invention; Fig. 2 is a cross-secti0nal view on the line 22 of Fig. 4, except the casing is omitted; Fig. 3 is a vertical section, on an enlarged scale through the flues at one side of the furnace; Fig. 4 is a vertical section on the line H of Fig. 1; Fig. 5 is a front elevational view of the furnace proper separated from the casing; Fig. 6 is a horizontal section on the line 66 of Fig. 4:; Fig. 7 is a plan view on a reduced scale of the track arrangement for sliding the furnace proper in and out of its casing; Fig. 8 is a vertical section on the line 88 of Fig. 4; Fig. 9 is an enlarged sectional detail showing the manner in which the casing sides and frame Specification of Letters Patent.

Patented Mar. 9, 1915. Serial No. 697,833.

are connected; Fig. 10 is an enlarged sectional detail showing how the upper and lower sections of the furnace are detachably. joined; Fig. 11 is an enlarged fragmentary detail of the roller and track arrangement which constitutes a feature of my invention.

Referring to the details of the accompanylng drawings, the casing which forms the outer wall of ance is rectangular in form and made up of a front section 12, side-walls, 12 top 12*, bottom 12 and rear wall 12, all of which are rigidly connected by angle-irons and bolts in any approved manner which will permit easy disconnection between the front 12 and the other sections. I11 the front wall section 12, is a feed-door 13, an ash-pit door 14:, a top flue clean-out door 15, and two side flue clean-out doors 16, all of which may be constructed and arranged to operate in any well-known manner.

At the lower edge of the casing front is an opening 17 through which the track section 22 may be inserted. Other openings 12 admit air through the rear wall 12. In the top wall 12 are openings supplied with collars 18 which form connections for suitable heat conductor pipes (not shown). I11 the rear wall l2 is an opening 19 which communicates with the smoke pipe (not shown). The water-pan is a trough-shaped receptacle. 20 which extends around the sides and back of the furnace and is supported from the casing walls by brackets 20*. The top of the water-pan is open and is positioned below and in proximity to certain of the hot-air flues as clearly shown in Fig. 8. The smoke-pipe collar 19 is at the rear of a rectangular extension 21 (Fig. 4) of the casing wall 12 and is provided with an opening it to the atmosphere which is controlled by a check-draft damper 21 in a manner well known in the art.

Secured to the inner side of the casing bottom 12, is a double rail track 22 which extends from the rear to the front of the casing, and at its forward end connects with an extension track 22 which is suitably placed either fixedly or removably on the floor in front of the furnace. These track rails receive the rollers 23 which are suitabl inclined bottom wall 27 of the furnace proper 24, which latter they support on the tracks. The furnace my improved heating appli y mounted as shown in Fig. 11 below the proper 24, is constructed with a lower section 249 and an upper section 24 the contiguous edges of which are connected by plates 28 which are placed on and overlap the oppos'te sides of the section edges and are rigidly bolted together by bolts 28", in the Figs. 5 and 10. In the upper section 24, is a feed opening 2& (Fig. 5) which registers with the opening in the front wall of the casing controlled by the door 13, and in the lower section, 24*, is an ash-pit opening 248, which registers with the casing opening controlled by the door 14:. The opening 2 1 communicates with firebox 25 and the combustion chamber 26 above the fire-box, and the opening 243* communicates with the ash-pit or pan 27 below the fire-box. The walls of the fire-box are lined with fire brick 25 25 the rear bridge wall 25, being backed up by an angle-plate 29, the hori-' zontal portion of which forms, with the top wall 30 of the furnace, a smoke outlet 31 which leads to the smoke-flue extension 21, and is controlled by a pivotally mounted damper 31 which in turn is operated by a damper rod 31 running forwardly and extending from the front wall of the furnace casing, as indicated in Fig. 4:.

Below the smoke flue 31', is a communicating flue 32 formed by the plate 29 and a shelf or partition 33, and c'ontrolled'by a pivoted damper 33 which is provided with an operating rod '33 which passes through and projects from the front casing-wall 12.

At the rear of the bridge wall 25*, and between it and the back wall 2? of the furnace proper, is an outlet chamber 341, in the bottem wall 34z of which, is mounted a damper 3 1 operated by adamper rod 341 extending from the front of the casing, said chamber serving as an exit for dust from the ash pit deposits from the products of combustron.

In the side walls 2 1 of the furnace 2 1 are openings 2 1? which communicate with the combustion chamber 26, and below the openings 2 l are similar openings 2 1, which communicat'e with the outlet chamber 341. Connected with the openings 2 1 by collars 35*, are rectangular flues 35 which extend forwardly and are supported from the furnace walls by Q-piece brackets 35 and 35 as shown in Figs. 5 and 6. Each of the fines is divided into two compartments 35, 35 by a partition 35 which extends horizontally from the wall adjacent the flue connections 35 forwardly the greater portion of the length of said flues but terminating before reaching the front end of the flue so as to leave a passageway for the products of combustion at the forward end of the flue, as shown in Fig. 3. Each flue has two openings35, 35, which communicates respectively with the openings24, 2 1 in the furnace walls, the

101 t being closed by the collars 35 as shown manner clearly shown n limited area they can in Fig. 6. In the front end wall of each flue 35 is an opening 35 through which access is had to the interior of the fines when the doors 16 are removed. Rocking grate-bars are suitably mounted below the fire-box 25 in any approved manner.

It will be noted that the four wheels 23 form a truck which carries the furnace proper and permits the latter to be drawn forwardly, when the few bolts which connect the walls of the furnace with the casing walls are removed. It should be understood that the front casing wall is connected with its side walls by as few bolts. as possible to efiect a practically tight joint, but the connection between said front wall and the front of the furnace proper is such that the latter moves forwardly with the casing front wall. It will also be apparent that as the water pan 20 is connected only with the casing sidewalls it will not be affected by the movements of the furnace proper.

In Fig, 9, I have illustrated a preferred way of detachably connecting the walls of the casing at the corners, in which I use angle-irons 36, fiat plates 37, insulating strips 38 and bolts 39, but any other approved method of efiecting such connections may be employed, as these are matters of mere mechanical detail.-

In using my improved furnace, when a fire is started in the fire-box 25, the damper 31' should be opened and the damper 33 closed, which positions will be just the reverse of those shown in Fig. 4. In this po-' sition of the dampers the draft willbe directly from the ash pan 27 through the fireboX 25, combustion'chamber 26, smoke-passage 31 and outlet 19 to the chimney. When the fire is in condition to require less draft, the damper 31 should be closed and 33 opened, whereupon the smoke and products of combustion will pass from the combustion chamber 26, out the openings 2 1, the connections 35, and traverse the flue compartments 35, 35 before passing out the opening 35 into the chamber 31 and thence to the chamber 32 and thus to the opening 19. As the walls of the flues '35 are entirely inclosed by the casing walls, the air within the latter which has entered through the openings 17 and 12 will be effectively heated before passing out the conductor openings 18. Any soot falling in the chamber 34 will be discharged by the action of gravity into the ash-pan upon opening the damper 34 It will be noted that the onlylaterally eX- tending flues in my improved furnace are the short connections between the flues 35 and the combustion chamber and as these are of be effectively cleaned by introducing a suitable tool through the door opening 24?, and the flue clean-out openings covered by the doors 16.

which connects with the smoke outpoint adjacent the passageway from said fire-box, an outer casing into and out of 15 which said first-mentioned casing is adapted to be moved, and a smoke conduit connected with the smoke outlet ports of said inner casing.

In testimony whereof I aflix my signature 20 in the presence of two witnesses.

J EDWARD EROANBRAOK.

Witnesses:

F. BENJAMIN, M. A. Mmonn.

Copies of this patent may be obtained for five cents each, by addressing the Washington, D. 0.

Commissioner of Patents, 

